Litter mat



FIG. 1 is a top perspective view of a litter mat showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a right side elevation view thereof, the left side elevation view being identical. 

CLAIM The ornamental design for a litter mat, as shown and described. 